wind your own tempcos

WeAreAs1 at aol.com WeAreAs1 at aol.com
Wed Dec 15 11:28:18 CET 1999


<< Do you know these little inductors, most suppliers carry them.
They are crap, a 63mH has series resistance of 700 Ohm!
You know where this is going to? Such a little coil should be a 
nice tempco with some parasitice inductance (copper wire). >>

Umm... depending on where the tempco was placed in the expo converter 
circuit, isn't it possible that the inductance of the coil might have some 
adverse effect on incoming control voltages that are being FM'd at audio 
rates?  Would the 63mH value be high enough that its effect would be out of 
the usable VCO range?  Of course, the additional copper wire you might add to 
it would surely change its overall inductance (to a larger value), wouldn't 
it?  (I hope I am making myself clear enough here, I'm not quite sure how to 
articulate this)

Michael Bacich



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